Amazon has rolled out its "sneak peek" for deals for Amazon Prime Day, including saving 50% off an Amazon Echo and up to 50% off grocery items by Amazon, including its Happy Belly products.

Amazon Prime Day is officially Tuesday. But the summer-time sale actually started at 6 p.m. on Monday and will run 30 hours this year.

Amazon uses Amazon Prime Day as a way to build sales in the dead of summer — and sign up Amazon Prime memberships.

Deals are limited to Amazon Prime members but Amazon continues to offer limited free trials at www.amazon.com/primeday.

Some of the promotional prices:

Amazon Echo is priced at $89.99 —- or 50% off.

Amazon Echo Dot is priced at $34.99 — a $15 savings.

Amazon Fire HD 8 Kids Edition is priced at $89.99 — a $40 savings.

Savings of up to 50% on select Callaway Golf Products.

Consumers who make purchases using the Amazon Prime credit card can get 20% back on many items, including Disney Pixar Car toys and select Thule joggling strollers.

Deals on TVs will be prominent, as usual. Amazon is promoting 25% off select TCL smart TVs, starting at $119.99 for a 28-inch TV.

Deals on Amazon grocery products include its private-label lines, such as Wickedly Prime cookies and popcorn and Happy Belly nuts, granola, and coffee.

Amazon is heavily promoting using its Alexa device to find promotions, too, by encouraging consumers who use Alexa to ask "Alexa, what are your Prime Day deals?" throughout the day. Alexa deals are to run through July 17.

One example of an Alexa deal is a promotion for saving 25% on the Hasbro Speak Out Game by saying "Alexa, order Speak Out."

Shoppers, of course, have plenty of online bargains to search through on Tuesday, as well as other days this week.

Best Buy, for example, has a line up that includes a Dyson Vacuum for $199.00 -- or $200 off -- and deals on an iPad Pro 9.7-Inch, a 39-inch Insignia HDTV, and on Powerbeats3 Wireless Earbuds.

Walmart declined to give a hint on its deals on Monday. Walmart noted that this year the retailer launched free, two-day shipping with no membership fee. And Walmart said customers can often get even lower prices at Walmart through the "Pickup Discount." Both are year-round offers.

Many "Prime Day" deals are as good, if not better than Black Friday, according to Brent Shelton, an online shopping expert at FatWallet.com, which offers coupons and promo codes for various retailers.